MARINE SHAKE U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, greets U.S. Marines stationed at the U.S. Embassy in Riyadh, Saudi Arabia, Feb. 20, 2011. Mullen is on a week-long trip through the Middle East to reassure friends and allies of the U.S. commitment to regional stability. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 330091-Q-MXH24-245.jpg Photo Gallery